Gets the background color of the component.
The default value is undefined, which means it is not set and the component has a transparent background.
The default skins of most Flex controls are partially transparent. As a result, the background color of a container partially shows through to controls that are in that container. You can avoid this by setting the alpha values of the control's fillAlphas property to 1.
protected Color backgroundColor { get; }
'Declaration Protected Read Property backgroundColor As Color